LeetCode 268 Solution – Missing Number | XOR + Sum Formula | Bit Manipulation | Java | Blind 75

LeetCode 268 Solution – Missing Number | XOR + Sum Formula | Bit Manipulation in Java | Blind 75 In this video, I explain *LeetCode 268: Missing Number* step by step using multiple approaches in Java. If you are searching for **LeetCode 268 solution, Missing Number explanation, XOR approach, Sum Formula, Bit Manipulation in Java, Blind 75, or an important DSA interview question**, this video will help you understand the complete approach clearly. The problem gives us an array containing `n` distinct numbers from the range `0` to `n`. Exactly one number is missing, and we need to find and return that missing number. This problem is useful for understanding: ✅ LeetCode 268 – Missing Number ✅ Presence / Boolean Array ✅ Sorting Approach ✅ Sum Formula ✅ XOR Operator ✅ Bit Manipulation ✅ XOR Properties ✅ Arrays ✅ Java Solution ✅ Time and Space Complexity ✅ Blind 75 ✅ DSA Interview Preparation ✅ Coding Interview Questions ✅ Software Engineering Interviews In this video, we discuss **four different approaches**: 1. Presence / Boolean Array 2. Sorting 3. Sum Formula 4. XOR / Bit Manipulation The optimized approaches solve the problem in **O(n) time and O(1) extra space**. The XOR approach is especially useful because identical numbers cancel each other: `x ^ x = 0` `x ^ 0 = x` After XORing the complete range and the array elements, the missing number remains. 📌 Chapters 00:00 Problem Statement & Example 00:32 Problem Summary & Approaches Overview 03:37 Presence / Boolean Array Approach 07:55 Sorting Approach 10:42 Sum Formula Approach 13:58 XOR Intuition 14:05 XOR Properties 15:06 XOR Dry Run 17:42 Time & Space Complexity 18:30 Java Solution in LeetCode Editor Problem: LeetCode 268 – Missing Number Difficulty: Easy Topic: Array, Math, Bit Manipulation Language: Java Series: Blind 75 🔑 Key Idea We need to identify which number from the range `0` to `n` is missing from the given array. The problem can be solved using extra space with a Presence Array, by sorting the array, mathematically using the Sum Formula, or optimally using XOR. 🧪 Example Input: `nums = [3,0,1]` Expected Range: `0,1,2,3` Missing Number: `2` Output: `2` 🔗 Problem: https://leetcode.com/problems/missing... Try solving the problem yourself before watching the complete solution. Keep Learning, Keep Growing 🚀 If this video helped you, like the video and subscribe for more **LeetCode solutions, Blind 75 problems, DSA in Java, Bit Manipulation, algorithms, and coding interview preparation**. Comment below which LeetCode problem you want me to solve next. #LeetCode268 #MissingNumber #BitManipulation #XOR #Java #Blind75 #DSA #CodingInterview